ABSTRACT
The academic literature that has emerged since the 1987 monograph clearly indicates, as reviewed herein, that scholars have become more microeconomic in their mode of analysis over the past decade-and-one-half. By more microeconomic we mean that they have delved into the black box through the construction of more disaggregated data sets; through the decomposition of R&D by character of use, by source of funding, and most importantly by source of underlying knowledge; and through the decomposition of capital and labor inputs by type and skill. We expect these trends in the field of technological change to continue.
